Cockatoo Nest for Cities Skylines.
It’s quite hard to reference a bird known for it’s crest when your building doesn’t have anything of the sort. But just as a crest adds some extra inches on the bird, some extra flooring can add in more capacity to a building. In this case, you can logically have six middle-class families live in here without a single problem. Your inner city areas will certainly appreciate the fact that you’ve squeezed more gentrification with this little townhouse.